[viatraco]

Quote:

 

 
To make the desired voltage, resistance may be changed to R1(510Ω).
 

Yes, T.IIZUKA you are right.Changing resistors obviosly change DC. Your post have high value. In future i will try some changes in Muse.
But crappy wallwart market supply included should be replace For safety hehehe
I wanted reduce dangerous overheating and i did it.
What do you think about loosing dynamic and making sound more soft by reduce DC output on TDA ? I've read some about this subject

 

[T.IIZUKA]

 
I've read some of the production.
TDA1543 voltage of 8V to think that many cases of this.
 
English text
http://www.pavouk.org/hw/spdifdac/en_index.html
Chinese text
http://bbs.hifidiy.net/viewthread.php?tid=14231&extra=page% 3D1
Japanese text
http://www.mimave.net/chibidac/DAC1543x3.html
 
If you change the voltage offset adjustment is needed. (Vref)

 

[sluker]

Where is a reliable place to buy one of these DAC's?

 

[ardilla]

I bought from http://myworld.ebay.com/leiqingjun1973/  He seems to be a good seller - when I told him my sample was dead - he told me to return for repair/replacement. We'll see how it turns out..
 

Guess you are aware that there have been some malfunctions, probably due to heat issues. If not, you are hereby warned.

 

However - I think it is worth the risk. And as you can read from this thread - a 9V 1.2A psu seems to make the heat issue go away

 

Fabolous sounding little person, this is. Just do not toggle the switch too much... 

 

Using search string: TDA1543 x4 DIR9001, these show up... There are also other auction-stores that have this dac listed, use google for those Good luck, and report your experiences!

 

cheers

 

http://cgi.ebay.com/HI-FI-DIR9001-4X-TDA1543-parallel-connection-NOS-DAC-S-/150537438882?pt=LH_DefaultDomain_0&hash=item230cbb06a2#ht_1479wt_903

 

http://cgi.ebay.com/Mini-DAC-TDA1543-x4-DIR9001-DAC-power-fr-DIY-T-AMP-/380301562957?pt=LH_DefaultDomain_0&hash=item588bbd544d#ht_1623wt_903

 

http://cgi.ebay.com/Mini-DAC-TDA1543-x4-DIR9001-DAC-power-fr-DIY-T-AMP-s-/290520585319?pt=LH_DefaultDomain_0&hash=item43a4605467This is the search string I used: tda1543 x4 DIR9001

 

http://cgi.ebay.com/Mini-DAC-TDA1543-x4-DIR9001-DAC-power-fr-DIY-T-AMP-B-/300512813079?pt=LH_DefaultDomain_0&hash=item45f7f5a017

 

[SP Wild]

Yes, I purchased my Dac from the same ebayer as ardilla, excellent service with regards to my sample malfunctioning as well, being five months old, my questions were answered promptly and I am going to send my sample for repairs.  My Bryston DAC is up for auction right now on ebay, and when the funds clear, I will purchase the single chip DAC to accompany the multi chip one.  I mean what an amazing sound for 60 freaking dollars! 
 
I suspect it is the DIR9001 that failed due to the excess temperatures inside the little case.  I will stick a heatsink on it when it gets repaired, also its a matter of four screws to remove the front and rear panels for extra airflow without resorting to drills.

 

[ardilla]

Great Good to hear that you're not giving up on the Muse ) 
 
This psu from headroom might work, btw:
 
http://www.headphone.com/accessories/headroom-portable-micro-power-supply---replacement.php

 

[SP Wild]

I can now use my variable PSU to check the different temperatures and voltages, also I can check the voltage going into the chips to see how they are affected by the lower voltages.  I was using this PSU as part of my full battery audio system to charge the 210ah of AGM batteries.
 
http://shop.voltelectronics.com.au/3v-to-15-volt-dc-40-amp-regulated-switchmode-laboratory-power-supply.html?utm_source=myshopping&utm_medium=cpc&utm_campaign=myshopping&gdftrk=gdfV2866_a_7c64_a_7c143_a_7c44_d_MP3090
 
 
I have since decommissioned the battery system because it took up too much space, which I needed to correctly place the giant Reference 7 DAC and Phoenix amplifier.

 

[ardilla]

ordered this one... hope it'll do the job
 
http://uk.rs-online.com/web/4006973.html
 
international
http://www.rs-online.com/index.html

 

[viatraco]

Looks good.Be careful on +/- plug direction
 
I opened wallwart supply included to DAC an my new one .I took pictures .I will add them on post later.

 

[viatraco]

Wallwart market supply added to Muse.My mistake .It is stabilised of course.
 
 

 
 
 
 
And this is my new one.Build is simple and easy to upgrade.In the future I will chance capacitor for BC/Philips ,diodes for fast MUR, better resistors heheh that means 90% of components
 
 

 

[googleborg]

bottom one looks nice and neat, good template for modding

 

[T.IIZUKA]

 
I had to work inside.
Socket system with power capacitor.
 

 
Just use the same case.
To do so, the capacitor must be next.
 

 
From left to right.
Original (Panasonic 25V470uF), Nippon-ChemiCon KZH 25V470uF, KZE 25V680uF, Panasonic 35V1800uF, KMG 35V1500uF, KY 35V1800uF, KMG 35V2200uF
 

 

Back side
 

 

[viatraco]

hmmm  sockets , good idea

 

[viatraco]

Yesterday I did some test listenings.
Usually I use laptop's optical output as a source.After buying Muse I just checked coaxial in muse if i'ts work.Yesterday I compared laptop and denon dcd-820 as a source. Denon sounds much much better. Don't use laptops spdif outputs (realtek) ! They sounds fine (I thought hehe) with muse unless you will try CD as transport via coaxial.Now I just realize how Dynaudio's D28 tweeter amazing is
I'm thinking of buying USB-SPDIF converter.

 

[T.IIZUKA]

Quote:

hmmm  sockets , good idea

Thank you. 

 
 
 
Replacing the capacitor. (470uF to 680uF)
I think the difference in the bass out.
Sound is now less than usual.
Because of the condition?
 
>>I'm thinking of buying USB-SPDIF converter.
 
Windows OS were, MONITOR MUSILAND I'm with them.
So I do not use MacOS.